Early onset Mirror Syndrome associated with foetal sacrococcigeal teratoma: a rare entity

In the mirror syndrome, maternal symptoms mime foetal and placental oedema. The pathogenesis is unknown. The most common etiologic associations are rhesus isoimmunization, twin-twin transfusion syndrome and viral infections. Few reports are associated to foetal tumors and particularly to sacroccoccigeal teratoma (SCT). Based on several published series, foetal SCT with placentomegaly and hydrops is almost universally fatal; foetal surgery is not typically offered for hydropic foetuses beyond 26 weeks of gestational age. Delivery of the foetus is the choise treatment when mirror syndrome is present with supporting the pregnancy until delivery is necessary for maternal indications or the foetus is 30 weeks old. The management of a patient with large foetal sacrococcygeal teratoma, hydrops foetalis and early onset mirror syndrome is presented.